timers with 1ms of precision

[Cambalinho]

Not 100 % sure about 1 ms, but try multimedia timers

i found these function

CreateTimerQueueTimer() maybe i find 1 sample. but, please see my class:

#include <stdio.h>
#include <windows.h>
#include <conio.h>
#include <stdlib.h>
#include <Mmsystem.h>

class Timer
{
    private: 
        int MilliSecondsTimer;
    private:
        bool blnDestroyed;
    private:
        HANDLE Handle_Of_Thread_1;
     typedef void (*MyTimerProc)();
    MyTimerProc TimerProcedure;
     static DWORD WINAPI StaticThreadProc(LPVOID param) {
        static_cast<Timer*>(param)->MultithreadProcedure();
        return 0;
        }
    public: 
        int SetMilliSeconds(int MilliSeconds)
        {
            MilliSecondsTimer = MilliSeconds;
            return 0;
        }
    public: 
        int GetMilliSeconds()
        {
            return (MilliSecondsTimer);
        }
    private: void   MultithreadProcedure() 
        {
            /*LARGE_INTEGER liFrequency;
            LARGE_INTEGER liStartTime;
            LARGE_INTEGER liCurrentTime;
            double a;

            QueryPerformanceFrequency ( &liFrequency );
        
            QueryPerformanceCounter ( &liStartTime );
            for (;;)
            {
                QueryPerformanceCounter ( &liCurrentTime );
                a=(int) ((double)( (liCurrentTime.QuadPart - liStartTime.QuadPart)* (double)1000.0/(double)liFrequency.QuadPart ));
                if (a>=MilliSecondsTimer) 
                {
                    TimerProcedure();
                    QueryPerformanceCounter ( &liStartTime );
                
                }


                if (blnDestroyed==true)  break;
            }*/
            int a=0;
            for (;;)
            {
                if (blnDestroyed==true) break;
                timeBeginPeriod(1) ;
                Sleep(1) ; 
                timeEndPeriod(1);
                a=a+1;
                if (a ==MilliSecondsTimer)
                {
                    TimerProcedure();
                    a=0;                    
                }
            }
            CloseHandle(Handle_Of_Thread_1);
            TerminateThread( Handle_Of_Thread_1,1);
        }
    public:
        int Start(MyTimerProc TimerProc) 
        {
            TimerProcedure = TimerProc;
            Handle_Of_Thread_1=0;
            CloseHandle(Handle_Of_Thread_1);
            TerminateThread( Handle_Of_Thread_1,1);
            blnDestroyed=false;
            HANDLE hMyThread;
            hMyThread = CreateThread(NULL, 0, StaticThreadProc, this, 0, NULL);
            return 0;
        }
    public: int Destroy()
        {
            blnDestroyed=true;            
            return 0;
        }
};

Timer test;

int a;

void  TimerProcedure()
{
    system("cls");
    a=a+1;
    printf("%d\n",a);
}



void main()
{
    test.SetMilliSeconds(10);
    
    test.Start(TimerProcedure);
    
    
    getch();
    test.Destroy();
    
}

why i don't get 100ms( or 10ms, at least)?